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Commit 8a5d2039 authored by Per Forlin's avatar Per Forlin Committed by Fabio Baltieri
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dmaengine: ste_dma40: use writel_relaxed for lcxa 



lcpa and lcla are written often and the cache_sync() overhead in writel
is costly, especially for wlan where every single network packet (in RX
mode) corresponds to a separate DMA transfer.

Signed-off-by: default avatarPer Forlin <per.forlin@stericsson.com>
Reviewed-by: default avatarNarayanan Gopalakrishnan <narayanan.gopalakrishnan@stericsson.com>
Reviewed-by: default avatarRabin Vincent <rabin.vincent@stericsson.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Acked-by: default avatarVinod Koul <vinod.koul@intel.com>
Signed-off-by: default avatarFabio Baltieri <fabio.baltieri@linaro.org>
parent 0fd60223

drivers/dma/ste_dma40_ll.c

+8 −8
Original line number Diff line number Diff line
@@ -332,10 +332,10 @@ void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa, 
{

	d40_log_lli_link(lli_dst, lli_src, next, flags);



	writel(lli_src->lcsp02, &lcpa[0].lcsp0);

	writel(lli_src->lcsp13, &lcpa[0].lcsp1);

	writel(lli_dst->lcsp02, &lcpa[0].lcsp2);

	writel(lli_dst->lcsp13, &lcpa[0].lcsp3);

	writel_relaxed(lli_src->lcsp02, &lcpa[0].lcsp0);

	writel_relaxed(lli_src->lcsp13, &lcpa[0].lcsp1);

	writel_relaxed(lli_dst->lcsp02, &lcpa[0].lcsp2);

	writel_relaxed(lli_dst->lcsp13, &lcpa[0].lcsp3);

}



void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
@@ -345,10 +345,10 @@ void d40_log_lli_lcla_write(struct d40_log_lli *lcla, 
{

	d40_log_lli_link(lli_dst, lli_src, next, flags);



	writel(lli_src->lcsp02, &lcla[0].lcsp02);

	writel(lli_src->lcsp13, &lcla[0].lcsp13);

	writel(lli_dst->lcsp02, &lcla[1].lcsp02);

	writel(lli_dst->lcsp13, &lcla[1].lcsp13);

	writel_relaxed(lli_src->lcsp02, &lcla[0].lcsp02);

	writel_relaxed(lli_src->lcsp13, &lcla[0].lcsp13);

	writel_relaxed(lli_dst->lcsp02, &lcla[1].lcsp02);

	writel_relaxed(lli_dst->lcsp13, &lcla[1].lcsp13);

}



static void d40_log_fill_lli(struct d40_log_lli *lli,